Optical focuser



FIG. 1 is a top plan view of the invented optical focuser;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for an optical focuser, as shown.